Brainscape's Knowledge GenomeTM

Browse over 1 million classes created by top students, professors, publishers, and experts.


See full index

neuro week 1 > ICL 8.0: Anatomy of the Neck > Flashcards

ICL 8.0: Anatomy of the Neck Flashcards

1
Q

where is the hyoid bone located?

A

between the mandible and hyoid cartilage

many ligaments and muscles etc. attach to it!

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
2
Q

what are the bony landmarks of the hyoid bone?

A

the whole bone is horseshoe shaped

there are 2 greater horns and 2 lesser horns –> the lesser horns stick up vertically

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
3
Q

which cervical vertebrae are atypical?

A

C1
C2
C7

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
4
Q

what are the characteristics of the atlas?

A
  1. no body; instead it has 2 lateral masses

the two lateral masses are connected together anteriorly by the anterior arch and posteriorly by the posterior arch

  1. no spinous process
  2. transverse formamen (vertebral artery passes through)
  3. transverse ligament that connected the lateral masses
How well did you know this?
1
Not at all
2
3
4
5
Perfectly
5
Q

what is the atlantooccipital joint?

A

the superior articular surface of the atlas articulates with the occipital condyles of the skull to form the atlantoocipital joint

this allows for flexion and extension aka the “yes” motion

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
6
Q

what are the characteristics of the axis?

A
  1. dens/odontoid process
  2. it does have a body!
  3. bifurcated spinous process
  4. transverse foramen
How well did you know this?
1
Not at all
2
3
4
5
Perfectly
7
Q

what is the atlantoaxial joint?

A

there’s actually 3 atlantoaxial joints! two lateral and one median

the median atlantoaxial joint is where the dens articulates with the atlas and allows for your head to rotate and make the “no” motion

the lateral atlantoaxial joints are you normal facet joint

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
8
Q

what is a C2 fracture?

A

Hangman’s fracture

usually due to hyperextension that leads to a pars interacticularis fracture

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
9
Q

what are the characteristics of normal cervical vertebrae?

A

C3-C6 are typical cervical vertebrae

  1. body
  2. pedicles
  3. transverse processes with transverse foramen

the transverse processes are made up of the anterior and posterior tubercles

  1. inferior and superior articular processes
  2. uncinate process
How well did you know this?
1
Not at all
2
3
4
5
Perfectly
10
Q

what is special about the transverse process of C6?

A

the anterior tubercle of C6 is called carotid tubercle

the common carotid artery passes next to the carotid tubercle

so in patients with high blood pressure or HR, you can massage the carotid artery into the carotid tubercle to reduce HR and BP

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
11
Q

what are the characteristics of C7?

A
  1. spinous process is NOT bifurcated = vertebra prominent
  2. NO anterior tubercle of the transverse process

patients who do have an anterior tubercle can develop thoracic outlet syndrome from the tubercle compressing on the lower trunk of the brachial plexus

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
12
Q

what is the platysma?

A

a superficial muscle in the neck; like if you strain your neck that’s the muscle you’re seeing

it attaches proximally to the clavicle and distally to the mandible

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
13
Q

what is the action and innervation of the platysma?

A

cervical branch of the facial nerve

it’s involved with making facial expressions

also people hypothesize that maybe when it contracts it prevents veins from collapsing by shielding them from negative pressure; total speculation

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
14
Q

what do you need to be careful with when it comes to incisions involving the platysma?

A

during suturing skin incision or wounds in the neck, the cut platysma needs to be sutured separately to prevent gaping of the wound and stretching of the skin scar

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
15
Q

what are the two main veins in the neck?

A
  1. external jugular vein

2. anterior jugular vein

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
16
Q

what is the course of the external jugular vein?

A

it starts from the union of the posterior division of the retromandibular vein with the posterior auricular vein

it then drains into the subclavian vein

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
17
Q

what is the course of the anterior jugular vein?

A

it starts by the confluence of submandibular and submental veins

it runs close to the midline of the neck on each side

the right and left anterior veins connect at their proximal ends via the jugular arch which then drains into the external jugular vein (which then drains into the subclavian vein)

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
18
Q

what are engorged neck veins pathological for?

A

engorged neck veins are common signs for heart disease such as, right-sided heart failure, cardiac tamponade, tricuspid valve disease, pulmonary hypertension

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
19
Q

during what procedure should you be worried about piercing the jugular arch?

A

tracheostomy

the jugular arch is in your way during tracheostomy and may cause bleeding

the jugular arch connects the left and right anterior jugular veins

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
20
Q

what are the 4 cutaneous nerves of the neck? what are their nerve roots?

A
  1. great auricular (the biggest) (C2,C3)
  2. transverse cervical (C2, C3)
  3. lesser occipital (C2)
  4. supraclavicular (C3,C4)
How well did you know this?
1
Not at all
2
3
4
5
Perfectly
21
Q

what is a good location to perform cervical plexus nerve block?

A

the cutaneous branches of the cervical plexus outcrop at the middle of the posterior border of the sternocleidomastoid muscle

this means that the great auricular, lesser occipital, supraclavicular and transverse cervical nerves all come out at this spot to do their cutaneous innervation of the neck so it’s a great spot to do a cervical plexus nerve block since they’re all there!

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
22
Q

inflammation of the gall bladder causes referred pain in the right shoulder? why?

A

the gall bladder and the cutaneous sensation of the right shoulder both have C3/C4 roots

so since the brain doesn’t really process visceral pain from organs such as the gallbladder, this pain is instead interpreted as right shoulder pain via the supraclavicular nerve

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
23
Q

what are the borders of the anterior triangle of the neck?

A

Mid-line of the neck

Lower border of the body of the mandible

Anterior border of sternocleidomastoid

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
24
Q

what are the borders of the posterior triangle of the neck?

A

posterior border of the SCM

middle 1/3 of the clavicle

anterior border of trapezius

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
25
Q

what is the sternocleidomastoid origin, insertion, innervation?

A

there are two heads of the muscle:

the sternal head comes from the manubrium while the clavicular head comes from the medial 1/3 of the clavicle –> the depression between the two is know as lesser supraclavicular fossa which contains supraclavicular lymph node

they insert at the mastoid process and the lateral 1/3 of the superior nuchal line

they’re innervated by the spinal accessory nerve

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
26
Q

what is the action of the sternocleidomastoid?

A

acting alone it tilts the head to ipsilateral shoulder but rotates the chin to the contralateral side

but acting together it extends and flexes the neck

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
27
Q

what is Torticollis?

A

aka Wryneck

it’s a congenital or spasmodic contracture of the SCM that result in deformity of the head and neck

persistent spasmodic contraction of SCM my require division of spinal accessory nerve

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
28
Q

what are Virchow lymph nodes?

A

between the sternal and clavicular heads of SCM there one/multiple lymph nodes and on the left side of the body they’re specifically called Virchow lymph nodes

they drain the abdominal structures and are enlarged in abdominal malignancy

on the right side of the body, these lymph nodes drain thoracic content structures and are enlarged in thoracic malignancy

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
29
Q

what is the clinical significance of the lesser supraclavicular triangle?

A

it’s the opening between the clavicular and sternal head of the sternocleidomastoid

it’s where you can access external jugular vein for central lines!

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
30
Q

what are the subdivisions of the anterior triangle?

A
  1. muscular triangle
  2. carotid triangle
  3. digastric triangle
  4. submental triangle
How well did you know this?
1
Not at all
2
3
4
5
Perfectly
31
Q

what are the borders of the muscular triangle?

A

anterior: mid-line of the neck
posterior: anterior border of SCM
superior: superior belly of omohyoid muscle

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
32
Q

what are the contents of the muscular triangle?

A
  1. all the infra hyoid muscles!

sternohyoid, superior belly of the omohyoid, sternothyroid, and thyrohyoid

  1. viscera of the neck

larynx, pharynx, trachea, esophagus, thyroid and parathyroid gland

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
33
Q

what are the infrahyoid muscles?

A

LAYER 1
1. omohyoid (superior and inferior belly)

  1. sternohyoid

SECOND LAYER
1. sternothyroid

  1. thyrohyoid

they all depress the hyoid bone

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
34
Q

what is the innervation of the infrahyoid muscles?

A

they are all supplied by the ansa cervicalis

EXCEPT the thyrohyoid which is innervated by C1

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
35
Q

what are the boundaries of the carotid triangle?

A

anterior: superior belly of Omohyoid
posterior: anterior border of SCM
superior: posterior belly of digastric

the floor of the carotid triangle is the superior and middle constrictor muscles of the pharynx

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
36
Q

what are the contents of the carotid triangle?

A
  1. common, external and internal carotid arteries
  2. internal jugular vein
  3. the last 4 cranial nerves
  4. ansa cervicalis
  5. cervical sympathetic trunk
How well did you know this?
1
Not at all
2
3
4
5
Perfectly
37
Q

what are the last 4 cranial nerves?

A
  1. glossopharyngeal nerve
  2. vagus nerve
  3. spinal accessory nerve
  4. hypoglossal nerve
How well did you know this?
1
Not at all
2
3
4
5
Perfectly
38
Q

describe the common carotid artery in the carotid triangle

A

the right common carotid arises from the brachiocephalic trunk

the left common carotid arises from the arch of the aorta

the common carotid arteries then dilate at the distal ends to form the carotid sinus where it divides into two terminal branches; the external and internal carotid arteries at the upper border of thyroid cartilage

no other branches in the neck!!

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
39
Q

where can you feel the common carotid artery pulse? why is this significant?

A

common carotid pulsation can be felt anterior to the anterior border of SCM and below the angle of the mandible

this is where you can listen for arterial bruit!!

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
40
Q

what is hypersensitive carotid sinus syndrome?

A

the carotid sinus has baroreceptors that monitor BP

some individuals have hypersensitive carotid sinus in which sudden movements of the head or pressure over the carotid sinus may evoke vagal reflex of slowing the heart rate with concomitant drop in blood pressure which may make the individual faints

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
41
Q

which receptors are in the carotid body?

A

chemoreceptors for O2 and CO2

if the level of CO2 and O2 changes, the phrenic and intercostal nerves are responsible for breathing and will change your breathing to bring gas levels back to normal

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
42
Q

where does the external carotid artery start and end?

A

the external carotid artery is a branch of the common carotid artery

it starts at the carotid sinus as one of the two terminal branches of the common carotid (the other is the internal carotid artery)
it ends at the neck of the mandible by giving two terminal branches = the maxillary and superficial temporal arteries

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
43
Q

what are the important branches of the external carotid artery?

A
  1. superior thyroid
  2. lingual
  3. facial
  4. occipital (pierces the trapezius)

the external carotid artery is more surgically accessible than some of it is deep branches

therefore, it is easier to ligate external carotid to control bleeding from one of its deep less accessible branches. It is ligated in the carotid triangle anterior to the anterior border of the sternocleidomastoid

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
44
Q

where does the internal jugular vein start and end?

A

it starts at the jugular foramen in the skull as a continuation of sigmoid sinus

it ends behind the sternoclavicular joint by joining the subclavian vein to form the brachiocephalic vein

it drains the brain, head and neck

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
45
Q

what should you be most scared of if the internal jugular vein is lacerated?

A

for most of its course, the IJV is protected by sternocleidomastoid

in the lower part between the sternal and costal head it is subcutaneous and may be punctured in a stab wound

bleeding may ensue, but the major risk is suction of air due to negative pressure, causing air embolism which may result in death (200-300 ml of air is fatal)

46
Q

what is the internal jugular vein often used for?

A

the extremely constant position and big size makes it a good vein to insert a central venous catheter to administer long term medications

47
Q

what neural structure is in the carotid triangle?

A

ansa cervicalis

this is part of the cervical plexus but it’s located in the carotid triangle just beneath sheath

it’s formed by C1, C2, and C3 which together form a loop that then branches to supply all the infrahyoid muscles (except the thyrohyoid which is C1)

48
Q

what is the route of the vagus nerve?

A

it leaves the skull through the jugular formamen and runs in the carotid triangle inside the carotid sheath, posterior to the common carotid and internal jugular vein

it then leaves the neck through the superior thoracic aperture behind the sternoclavicular joint

49
Q

what are the branches of the vagus nerve?

A

the superior laryngeal nerve comes off of the vagus nerve

it then branches into the internal and external laryngeal nerves

there’s also the recurrent laryngeal nerves which branch off of the vagus nerve either under the aorta on the left side or under the right subclavian artery on the subclavian

the right recurrent laryngeal nerve loops under the subclavian artery and goes back up between the esophagus and trachea to supply sensation to the muscles of the larynx

but on the left side, the left recurrent laryngeal nerve loops directly under the arch of the aorta

50
Q

what is the route of the spinal accessory nerve 11?

A

it leaves the cranial cavity through the jugular foramen and runs in the carotid triangle for a short distance then dives into the sternocleidomastoid and supplies it

it then emerges from the posterior border of the SCM and runs in the posterior triangle of the neck

it then disappears under the deep surface of trapezius and ends by supplying it

51
Q

which CN is the spinal accessory nerve?

A

11

52
Q

which CN is the hypoglossal nerve?

A

12

53
Q

what is the route of the hypoglossal nerve?

A

it emerges from the skull through the hypoglossal canal

it then runs in the carotid triangle downward, parallel to the posterior belly of the digastric muscle

then it passes under the intermediate tendon of the digastric muscle to reach the digastric triangle

then once it’s in the digastric triangle, it dives deep to the mylohyoid muscle to reach the oral cavity where it ends by supplying the muscles of the tongue

54
Q

what is the route of the cervical sympathetic trunk?

A

runs in the carotid triangle outside the carotid sheath over the prevertebral fascia

it has 3 ganglia

55
Q

what are the 3 ganglia of the cervical sympathetic trunk?

A
  1. superior cervical ganglion is the fused upper 4 cervical ganglion (C1-C4)
  2. middle cervical ganglia is the fused C5 and C6 cervical ganglia
  3. inferior (stellate) ganglion is the fused C7, C8 and T1 ganglia
56
Q

if there’s a lesion on the cervical sympathetic trunk, what would happen?

A

a lesion of the cervical sympathetic trunk results in loss of sympathetic innervation to the head

this is a condition called Horner’s syndrome!

it’s characterisiteed by ptosis, myosis and anhidrosis

57
Q

what are the boundaries of the digastric triangle?

A

the posterior digastric muscle to the lower border of the body of the mandible to the anterior belly of the digastric muscle

the floor is the mylohyoid muscle

58
Q

what are the contents of the digastric triangle?

A
  1. submandibular salivary gland
  2. part of the hypoglossal nerve
  3. facial artery
59
Q

what happens if there’s a tumor on the submandibular salivary gland?

A

it could compress the hypoglossal nerve

60
Q

what are the 4 suprahyoid muscles?

A
  1. digastric (posterior and anterior belly)
  2. stylohyoid
  3. mylohyoid
  4. geniohyoid
61
Q

describe the digastric muscle?

A

2 bellies = posterior and anterior

the two bellies have intermediate tendon between them and is kept in place by fibrous loop attached to the hyoid bone

62
Q

what is the innervation of the digastric muscle?

A

anterior belly = nerve to mylohyoid

posterior belly = facial

63
Q

what are the subdivisions of the posterior triangle of the neck?

A
  1. occipital triangle
  2. supraclavicular triangle

the inferior belly of omohyoid divides the posterior triangle into supraclavicular below and occipital triangle above.

64
Q

what are the contents of the posterior triangle of the neck?

A
  1. branches of the cervical plexus
  2. spinal accessory nerve
  3. terminal part of external jugular vein
  4. occipital artery (at the apex)
  5. transverse cervical artery
  6. suprascapular artery
  7. dorsal scapular artery
  8. inferior belly of omohyoid
  9. subclavian artery
  10. subclavian vein

slide 35 GO LOOK

65
Q

which muscles form the floor of the posterior triangle of the neck?

A
  1. anterior scalene
  2. middle scalene
  3. posterior scalene (not exactly in the floor because it’s deep)
  4. levator scapulae
  5. splenius capitis
  6. semispinalis capitis
66
Q

what emerges between the anterior and middle scalene?

A

brachial plexus

67
Q

which nerve roots form the cervical plexus?

A

the anterior rami of the first 4 cervical

each ramus (except the first) divides into ascending and descending parts forming communicating loops –> from these loops arise the motor and cutaneous branches

68
Q

what are the motor roots of the phrenic nerve?

A

C3, C4, C5 keep the diaphragm alive

69
Q

why is the spinal accessory nerve susceptible to damage?

A

the superficial position of the spinal accessory nerve in the posterior triangle just beneath the skin and investing layer of the deep facia makes it susceptible to injury during surgery and stab wound

70
Q

what is the effect of injury of spinal accessory nerve in the posterior triangle?

A

shoulder drop

spinal accessory nerve innervates your trapezius!

71
Q

what are the deep muscles of the anterior neck? what are they innervated by?

A
  1. rectus capitis anterior
  2. rectus capitis lateralis
  3. longus capitis
  4. longus colli

they are generally flexors of the head and neck

they are supplied by motor nerves from the roots of the cervical and brachial plexuses

72
Q

what are the deep muscles of the lateral neck? what are they innervated by?

A
  1. anterior scalene
  2. middle scalene
  3. posterior scalene

they are innervated by branches from the ventral rami of the cervical and brachial plexuses

73
Q

what is the action of the deep muscles of the lateral neck?

A

flexor and lateral bending of the neck

they’re also accessory muscles of inspiration

74
Q

what is the root of the neck?

A

the lower area of the neck sitting on the superior thoracic aperture and apex of the axilla

it contains structures passing from the thorax to the neck and from the neck to the thorax

it also contains structure passing from the thorax and the neck to the upper limb and from the upper limb to the thorax.

75
Q

in what location would you perform a brachial plexus nerve block?

A

the needle is inserted in the lower lateral part of the posterior triangle

76
Q

what is thoracic outlet syndrome?

A

hypertrophy of the scalene muscles could compress the subclavian artery

77
Q

what is horner syndrome?

A

invasion of the stellate ganglion by Pancoast tumor

the tumor will effect the sympathetic fibers as they exit the cord at T1 and ascend to the superior cervical ganglion will produce Horner’s syndrome

78
Q

what should you worried about with a medial clavicle fracture?

A

you could puncture the subclavian vein causing an air embolism

79
Q

where does the subclavian artery begin and end?

A

it originates from the arch of aorta on the left side and from brachiocephalic artery on the right side

it then ends at the outer border of the first rib by becoming axillary artery

80
Q

what is the demarkation for the divisions of the subclavian artery?

A

first part = medial to the anterior scalene

second part = deep to the anterior scalene

third part = between the lateral border of the anterior scalene and the outer border of the first rib

81
Q

what arises from the 1st division of the subclavian artery?

A
  1. vertebral artery
  2. internal thoracic
  3. thyrocervical

branches into suprascaular, transverse cervical and inferior thyroid

82
Q

what arises from the 2nd division of the subclavian artery?

A

costocervical trunk

83
Q

what arises from the 3rd division of the subclavian artery?

A

dorsal scapular

84
Q

What happens in the narrowing, stenosis, or blockage of subclavian artery at the three divisions 1-3 on the blood supply of the upper limb?

A

there’s collateral circulation between the 1st and 3rd division!

so if you compress distal to the thyrocervical trunk in the first division it’s okay because the transverse cervical artery will anastomoses with the dorsal scapular

85
Q

what is subclavian steal syndrome?

A

Subclavian steal syndrome is a rare condition causing syncope or neurological deficits when the blood supply to the affected arm is increased through exercise

this happens secondary to a proximal stenosing lesion or occlusion in the subclavian artery, typically on the left

so your upper limb is stealing blood from the brain!

86
Q

where does the subclavian vein start and end?

A

it starts at the outer border of the first rib as a continuation of the axillary vein

it ends behind the sternoclavicular joint by joining the internal jugular vein to form brachiocephalic vein

the external jugular vein also drains into the subclavian vein

87
Q

describe the thyroid gland

A

the thyroid gland is located in the lower part of the neck and is made of two conical lobes connected by narrow isthmus in the midline

the apex of each lobe is level with oblique line of thyroid cartilage which is level with C5

the base of the lobe is level with 4th or 5Th tracheal ring which is about T1

the Isthmus crosses anterior to the 2nd and 3rd tracheal rings –> may need to be divided during tracheostomy

88
Q

what fascia covers the thyroid gland?

A

pretracheal fascia

it forms a capsule around the gland

it is attached superiorly to the thyroid cartilage of the larynx and the moves up and down with larynx and hyoid bone during swallowing –> this movement of the gland during swallowing has differential diagnostic value to differentiate thyroid lump from extra-thyroid lump

89
Q

how do surgeons access the thyroid?

A

the infra hyoid muscles cover the hyoid!

these muscles need to be retracted laterally or even divided to expose the thyroid gland during thyroidectomy

90
Q

what is the posterior border of the thyroid gland?

A

the posteromedial surface is molded around the larynx and pharynx superiorly, and around the trachea and esophagus inferiorly

91
Q

which nerves run next to the thyroid?

A
  1. the external laryngeal nerve runs between the thyroid gland and larynx
  2. the recurrent laryngeal nerve runs between the thyroid and the esophagus and trachea

the close relation of the external and recurrent laryngeal nerves to the thyroid gland are at risk during thyroidectomy, goiter or thyroid malignancies.

similarly, close relation of the esophagus, trachea, larynx and pharynx makes them susceptible to pressure symptoms during enlargement of thyroid or thyroid or thyroid malignancy

92
Q

which arteries supply the thyroid gland?

A
  1. superior thyroid artery (branch of the external carotid)
  2. inferior thyroid artery (branch of the thryocervical trunk)
  3. tiroidea ima artery ((branch of the arch of aorta or brachiocephalic trunk)
93
Q

what is the venous drainage of the thyroid gland?

A

the superior and middle thyroid veins drains into the internal jugular vein

the inferior thyroid vein drains into left brachiocephalic vein

94
Q

which structures are at risk during a thyroidectomy?

A

the superior and inferior thyroid arteries are crossed by external and recurrent laryngeal nerves, respectively

both nerves are at risk during ligation of these vessels during thyroidectomy

95
Q

which vessel associated with the thyroid gland could be damaged during a tracheostomy?

A

the thyroidea ima artery and inferior laryngeal veins are in the midline and may cause bleeding during tracheostomy

96
Q

what is the parathyroid gland?

A

4 small lentiform masses 50 mg each that are located on the posterior border of the thyroid gland

it secretes parathyroid hormone which is essential for calcium homeostasis and essential for life

blood supply is mostly derived from the inferior thyroid artery

97
Q

why would a physician opt to do a partial thyroidectomy rather than a full?

A

during partial thyroidectomy the posterior part of the gland is preserved to preserve the parathyroid glands

accidental removal of parathyroid gland during thyroidectomy causes hypocalcemia and calcium therapy is needed

98
Q

what are the 3 cervical fascia?

A
  1. prevertebral fascia
  2. alar fascia
  3. pretracheal fascia
99
Q

what is the alar space? what is a potential complication involving it?

A

the space between alar fascia and prevertebral fascia

it extends into the thorax in the posterior mediastinum to the diaphragm

an infection in the pharynx extending into the retro pharyngeal space, may extend to the alar space which could then reach down to the posterior mediastinum causing mediastinitis –> if not promptly and aggressively treated may result in death

100
Q

which vein of the following may cause bleeding during tracheostomy?

A, External Jugular vein

B. Internal jugular vein

C. Jugular arch

D. Superior thyroid vein

A

C. Jugular arch

101
Q

which nerve of the following is at risk during ligation of superior thyroid artery during thyroidectomy?

A, Vagus nerve

B. Superior laryngeal nerve

C. External laryngeal nerve

D. Internal laryngeal nerve

E. Recurrent laryngeal nerve

A

C. External laryngeal nerve

102
Q

thyroid tumor on the medial surface, near the base of the right thyroid lobe may compress which of the following structure?

A.Larynx

B. Pharynx

C. Common carotid artery

D. Vagus nerve

E. Esophagus

A

E. Esophagus

103
Q

depression of the hyoid bone can be achieved by the contraction of which muscle of the following?

A. Digastric

B. Sternohyoid

C. Mylohyoid

D. Stylohyoid

E. Geniohyoid

A

B. Sternohyoid

104
Q

while driving, you need to make a lane changes into the right lane so you glance over the top of your right shoulder to make sure, the lane is clear and it is safe to change the lane. Which muscle of the following is contracting while looking over your right shoulder?

A. Left sternothyroid

B. Left omohyoid

C. Right sternohyoid

D. Left sternocleidomastoid

E. Right digastric

A

D. Left sternocleidomastoid

105
Q

which vessel of the following may be injured during tracheostomy and cause bleeding?

A. Common carotid artery

B. Internal jugular vein

C. Thyroidea ima artery

D. External jugular vein

E. Retromandibular vein

A

C. Thyroidea ima artery

106
Q

which muscle of the following elevates the hyoid bone during swallowing?

A. Sternothyroid

B. Sternohyoid

C. Thyrohyoid

D. Mylohyoid

E. Omohyoid

A

D. Mylohyoid

107
Q

to stop bleeding from axillary artery from stab wound in the axilla, you press the subclavian artery against which of the following structure?

A, Anterior scalene

B. Middle scalene

C. First rib

D. Middle third of the clavicle

E. Sternoclavicular joint

A

C. First rib

108
Q

During partial thyroidectomy which part of the gland should be preserved?

A. Medial surface

B. Apex of the lobe

C. Base of the thyroid lobe

D. Isthmus of thyroid gland

E. Posterior border of the gland

A

E. Posterior border of the gland

109
Q

Which of the following bony landmark is used to count thoracic vertebra?

A. Spine of the scapula

B. Spine of C6

C. Spine of C7

D. Spine of T1

E. Transverse process of C7

A

D. Spine of C7

110
Q

Which vein of the following may cause bleeding during tracheostomy?

A. Inferior thyroid vein

B. External Jugular vein

C. Internal jugular vein

D. Superior thyroid vein

A

A. Inferior thyroid vein

neuro week 1 (9 decks)

Brainscape helps you reach your goals faster, through stronger study habits.
© 2024 Bold Learning Solutions. Terms and Conditions